Bicycler s tool



UNITED STATES PATENT OFFICE.

ROBERT CROZIER FAWCETT, OF CARROLLTON, O-HIO.

BicYcLERsTooL.

SPECIFICATION forming part of Letters Patent No. 544,726, dated August 20, 1895.

Application led April 9, 1895. Serial No. 545,050. (No model.)

To @ZZ whom t may concern.-

Be it known that I, ROBERT CROZIEE FAW- CETT, of Carrollton, in the county of Carroll and State of Ohio, have invented, certain new and useful Improvements in Bicyclers Tools; and I do hereby declare that the following specification, taken in connection with the drawings furnished and forming a part of the same is a clear, true, and complete description of my invention.

A tool embodying my invention is adapted to perform the double duty of a monkeywrench and an air-pump, and although tools having said capacities have been heretofore devised I have sought to simplify and economize in construction, and also to provide for strength, compactness, light weight, and specially reliable and convenient operation.

In the use of my novel implement as a pump the charging-tube couples the head of the Wrenchwith the bicycle-tire, and when a long tube is used said head serves as the base of the pump and can be firmly grasped by and conveniently held in one hand of the operator. If a long flexible charging-tube is used, or a short one, it'can pass between his fingers or, in either case, the head of the wrench may be firmly clamped 'by'his hand against an adjacent solid portion of the rim of a wheel, or said head may be directly coupled to such rigid metal tubes as are employed in many machines. The handle of the wrench consists of a tail-piece, usually a screw-threaded shank, secured to or integral with the outer jaw, and in one form of my -device an inclosing-cylinder in its simplest form is concentrically mounted on said shank. Said cylinder serves also as the barrel of the ai r-pump, and the shank serves as a hollow or tubular piston-rod. The cylinder at its front end has an interior collar, which serves as a guidebearing on the shank, and the latter at its end carries a suitable piston which, as well as said collar, serves as a radial support for the cylinder with reference to the shank when the tool is used as a wrench. The cylinder at its front end is provided with a rotativelycoup led screw-threaded sleeve, and a portion of the wrench-nut is threaded for the reception' of said sleeve, so that said nut performs not only all of the usual functions of a wrench-nut, but also serves as a part of a union-joint for firmly coupling the cylinder to the wrenchhead.

A slightly more expensive and very effective form of my device embodies a sectional cylinder which by its telescopic movement, as in all such pumps, enables a long and effective stroke; but this cylinder, like the simple cylinder in the form of my device previously referred to, is locked by the wrenchnut, and the two forms of tool may be precisely alike in external dimensions and appearance.

device which embodies a sectional or telel Fig. 5 illustrates a modifi-v scopic cylinder. cation of the piston which is provided with a combined pistonpacking and checkfvalve.

I will first describe the form of tool shown in Figs. I, 2, and 3, The outer jaw A of the wrench-head has a tail-piece, usually a screwthreaded shank a, preferably flat on one or two sides, and which in my wrenchis tubular, thus affording an air-duct d', extending throughout its length and opening at the center of the head, where a screw connection at a2, is provided for coupling with either a threaded collar or a nozzle in making connections with the usual pneun1atictirecharg ing tubes or pipes. The inner jaw B is mountedY upon the rectangular or squared neck of the shank a, and is coupled thereto by the wrench-nut C in a manner well known, but said nut is novel in having at one end, as atb, a screw-threaded neck, which is engaged by an internally screw threaded sleeve D, which in turn is freely coupled rotatively' to the cylinder E, these parts being so united, as shown in Figs. 1 and 2, when the tool is to be used as a wrench. At the inner end of the cylinder there is a screw-threaded collar c, which affords an outside rim for engagement by the sleeve D, and at the end of the shank @there is a piston F, so that when used as a wrench the cylinder, as a part of the handle, is firmly supported radially at both ends by or upon the shank. The peripheries of the nut and sleeve D are milled for facilitating the opening and closing of the jaws, as well as for the convenient union and separation ot' the nut and sleeve.

W'hen the tool is to be used as an air-pu mp, the'jaws are closed and the cylinder uncoupled from the nut C, as shown in Fig. 3. The piston F is provided with a suitable gasket or packing d, which is secured in position by a clamping disk or nut e to the end of the shank d. In this instance the packing is a cupshaped disk of leather, rubber, or other suitable material, and it snugly ts the interior of the cylinder. The body of the piston does not tightly fit the cylinder,'and the clampingdisk is smaller than the packing-disk, so thatwhen the cylinder is moving outwardly air may properly enter around the piston, but when the cylinderis making a forcing-stroke the packing makes an air-tight contact with the cylinder. Although the collar c at the inner end of the cylinder has its bearing upon the screw-thread of the shank d and serves as a guide-bearing, ample induction of air is aorded by way of the space always open between the collar and the bottom of the screwthread convolutions, even when the shank is round, and when,as is preferable, said shank is lat on one or two sides, as is common in wrenches, the collar c, having an opening which conforms thereto, renders the cylinder non-.rotative with reference to the shank.

Referring now to the sectional-cylindertool of Fig. 4, it will be seen that it embodies the several parts of the wrench portion of the organization already described, and hence like letters of reference have been applied to said parts. This cylinder E is composed of two tubular telescoped sections, the outer section f being slidably mounted upon the inner section f and the latter being in turn slidably mounted on the piston F and on the hollow shank or stem a, and having at its inner end a screw-threaded guide-bearing c', which performs the guiding function of the collare used in the simple cylinder-tool. At the opposite or outer end of the inner section f there is an air-port n.3 and a packing d', so that this section operates as a piston with reference to the outer section f, this latter being guided and radially supported on the inner section, the outer section having at its inner end a screw-threaded collar c2, which serves as a guide-bearing with relation to tlieinner section, and also co-operating with the threaded sleeve D for tirmly locking the cylinder to the wrench-nut, as in Fig. 2.

Thepumping portion of the tool may or may not be provided with a check-valve, this being deemed by many to be of little consequence when a bicycle-tire containsa check-valve or an equivalent device. In Fig. 5, however, I illustrate a piston F', which is tapped to and pinned upon the end of the shank d and provided with a packing cl2, which is molded in the well-known cup-shaped form and is secured in position by means of an annular plate c2 and screws or pins. At the center of this packing there is a rearward projection slitted, as at e3, which operates as a check-valve, because it so occupies the entrance to the airduct d that air may 4freely pass inwardly to the duct during the compressing action of the cylinder, but is closed against reflex action by the resiliency of the material and by the air-pressure within the duct.

It will be seen that the tool in either of the forms shown and described is simple and quite inexpensiveinits constructiomis compactand capable of being made of requisite strength, with no undue weight in metal, and that it can be conveniently operated with reliable eiciency.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. Abicycle tool adapted for use as-a wrench and as an air pump, embodying in combination substantially as described, a wrench provided with a tubular shank, and with a suitable pipe connection at the head of the wrench a piston on said shank; a cylinder inclosing the shank, and radially supported thereon by a suitable guide bearing and said piston; a wrench nut, and a screw coupling for detachably uniting the cylinder to the wrench head, and enabling said cylinder to be used either as a'wrench handle, or as an air pump cylinder.

2. In a combined wrench and air pump, the combination substantially as described, of a tubular shank serving as a tail piece for the jaws of the wrench, also asa piston rod, and also as an air duct; a suitable piston on said shank, and a cylinder detachably secured to the wrench head, and serving as a pump barrel when detached, and as a handle to the wrench when secured.

3. In a combined wrench and air pump, the combination with a wrench head, and a cylinder serving as a handle and as a pump barrel, of a wrench nut, and a sleeve rotatively mounted atone end ofthe cylinder, and screw coupled to the wrench nut, substantially as described.

ROBERT CROZIER FAVCETT.

Witnesses: j

WILLIAM HUsToN, EMMA S. FAWCETT.

IOC 

